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MMP-2 and MMP-9 serum concentration in breast cancer survivors and healthy subjects. (A) Significant differences in MMP-2 levels were identified in group B when compared with groups A (P=0.028), C (P=0.008), D (P=0.001) and E (P=0.02). *P<0.05 vs. B. (B) No significant differences in MMP-9 levels were identified between groups A-E. MMP, matrix metalloproteinase.
